cannot download from bilibili, "no videos found"

[chjlang]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2016.08.17. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

./youtube-dl --verbose http://www.bilibili.com/video/av5782830/index_1.html
[debug] System config: []
[debug] User config: []
[debug] Command-line args: [u'--verbose', u'http://www.bilibili.com/video/av5782830/index_1.html']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.08.17
[debug] Python version 2.7.1 - Linux-2.6.18-194.el5-x86_64-with-redhat-5.5-Final
[debug] exe versions: none
[debug] Proxy map: {}
[BiliBili] 5782830: Downloading webpage
[BiliBili] 9388980: Downloading video info page
ERROR: No videos found!; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 691, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 347, in extract
    return self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/bilibili.py", line 122, in _real_extract
    raise ExtractorError('No videos found!')
ExtractorError: No videos found!; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
...
<end of log>

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[yan12125]

For those who are interested in Bilibili: this website now uses emscripten, which (indirectly) compiles C/C++ to Javascript. I find it very difficult to analyze. If anyone know how to reverse emscripten-generated codes, please propose here. Thanks!

[remitamine]

from the mobile website, it possible to extract lower quality using http://www.bilibili.com/m/html5?aid=<aid>&page=1.

[gdkchan]

So I reversed the bilibili signature generation, and here you can find a C# source code that takes a Bilibili video url and returns the stream URL. Meat of the decoding function is on bilibiliPlayer.min.js. It haves a VM that interprets emscripten bytecode like was said here before. It calculates the MD5 Hash of a string to generate the signature. Relevant stuff on this string includes the Video CId, an AppKey (different from the other ones used on the page it seems), and another bigger key that seems to be calculated from one of the "external" (from the VM point of view) Javascript functions.

Worked with the few videos I tested here, if anyone try this out let me know if it's working too. Also if info on how to get the "constant" keys is needed too just let me know.

Note: I guess that the keys change within different player versions (maybe?), will need to observe for some time to see.

[yan12125]

Amazing! I'll try to translate C# to Python.

I guess that the keys change within different player versions (maybe?), will need to observe for some time to see.

It's common in Chinese websites. I have a set of scripts at https://github.com/yan12125/iqiyi-hack that extracts keys automatically by Selenium. It's originally written for Flash players, while it should not be difficult to add codes for Javascript-based players.

[gdkchan]

@yan12125 The code is pretty simple and I added some comments too, should be easy to translate. Also interesting scripts you made, I'm not sure if the 128-bit key can be extracted "automatically" through, since it seems to be generated inside the VM (unless I missed something). It would probably be possible to extract it automatically by having a JavaScript engine running the player code, stopping the thing in the middle and grabbing the Key from the VM Heap, maybe.

[yan12125]

In previous cases, I patch the Flash player so that it posts the key to my server. Then I use an HTTP proxy to intercept requests to the main player. For Bilibili, I guess intercepting the MD5 function is a possible approach.

[yan12125]

Thanks to @gdkchan, BiliBili support will be back in the next version.

[weituotian]

@yan12125 how to patch the Flash player?

[yan12125]

@weituotian See https://github.com/yan12125/iqiyi-hack for details